2008 Volume 17 Pages 143-152
Road projects have started to utilize 3-dimensional CAD. However, the terrain data suitable for such designs is still not available. As such, 3 dimensional terrain data is being prepared by manual input during the design phase. This has hindered the improvement of efficiency. The present study was focused on the DM data format used in geographical survey and examined the “Extended DM format data creation specification for road design” for 3 dimensional terrain data.
In this study, the applicability of DM format to the data creation work and its usability in the design phase was evaluated aiming at the expansion of this specification. Further, the specification was modified based on the result, and finally, the software requirements for effective use of the 3-dimensional terrain data were studied.
